Pump



March 1 1927.

J. MILLS PUMP Filed Sept. 22. 1924 gwuentoz especially to provide for Patented Mar. 1, 1927.

zrosurn MILLS, oncoannnnsr, ALBERTA, CANADA.

PUMP.

Application filed September 22, Serial No. 739,094.

This invention relates to pumps.

An Object of this invention is to reduce the power necessary to operate a pump, and

pumping high elevations at a minimum power. I have discovered that by reason of the fact that a body immersed in water in the form of an open tube has substantially no resistance except that ofthe friction of the water, that by providing a column of water equal to the weight of a moving piston I can so arrange this columnv that it equals the altitude 'to which I desire to pump.

It is an object of this invention to take advantage of the foregoing principle, and to provide a simple and elficient means of carrying out the foregoing principle.

' With the above and other objects in view I I have invented the device shown in the accompanying drawings, 1n whlch:

V Figure 1 is a vertical section partly in elevation through my device.

Figure 2 is 'a section at '22 Figure 1.

slightly reduced.

Like reference characters indicate like parts throughout the several views of the drawings and in the specification, in which 2 indicates generally a piston and stem, the stem being specifically indicated at 4C, and the piston head at .5, there being provided in the end of thepiston head a valve The piston head is cylindrical in form, and is open at the lower end, being provided with a valve seat 6 to seat the valve 3. Upon the opening of the valve 3 the piston head becomes inthe nature of an open cylinder. tially to the height to which it isdesired to elevate the water, the intent being to discharge into a tank such as 7 through a spillway 8. The distance from the top of the stem 4 of the piston 2 to the mouth of the spillway 8 is slightly less thanthat of the stroke ofthe piston, so that the piston is always completely immersed in water; Surrounding the piston stem 5 is a water conduit in the nature of a reservoir 9, which is in this instance a pipe surrounding the pis ton stem a. This pipe depends to a wall 10, which wall 10 is the dividing line of pressure Branching from the conduit 9 are a pair of branch conduits 11 and 11. These conduits 11 and 11 together with the conduit 9 are so predeterminedin size relative' to the weight of the piston 2, that the The piston 2 extends substan water therein down to a point co-planer with the wall 10, is equal to the weight of the piston. Assuming then that the water were stopped off at the wall 10, and the piston were floating in the water, it would be substantially buoyant, so that no force would be required to move )the piston other than that of" overcoming the resistance and friction of the water. A part of this invention is that the water is maintained in the conduits'll, 11 and 9, so that this column of water equals the weight of the piston 2. Beneath the wall 10 is carried a tank 12, cut off by valves 13 and 13 from the source of water supply in a predetermined manner. Beneath the tank 12 is a tank 14 separated'from the tank 12' by a wall 15, but adapted to communicate with the tank 1 1 by the valve 3 actuated in a manner'hereinafter described. It'is obvious therefore that when the tank 12'is in communication with the tank 14, both'having been filled. and the column of water being in the conduits 9', 11 and 11, that the'weight of the piston will maintain the water .in the conduits 11 and '11, and that any movement of the piston by reason of the fact that it is completely immersed during this movement, will simplybe the movement in a column of water having no other resistance than that of'fric'tion.-"The tanks 12 and Marc carried in a shell 16, which shell 16 is completely immersed in water, and preferably considerably below the water level, but in this instance is shown by the'waterlevel line 17. There is provided within the shell 1.6 an open top receptacle lS, which is in free communicationwith the outside water, andwhich opens into the tank 12 through valves 13. It is obvious that the normal pressure of the water in column 9 automatically will cause the valves 18 and 13 to normally remain closed, since these valves are buoyant by floats such as 18 and 13 so that the water in the column 9 is thereby prevented from escaping. Further, on the downward movement of the piston head 5,

the valve 3 being normally closed by pressure prevents any escapement of water from the chamber 14 to the chamber 12, and thereby the downward movement of the piston head 2 causes the water in the column '9 to spill over into the tank 7 until, it has reached the limit of its downward motion, which movement also causes a suction againstthe valves 13 and 13', thereby filling the tank 12. Upon the upward movement of the piston head 5, the pressure of the water in the tank 12 immediately causes the valve 3 to open and closes the valveslZ-B and 13', which valve 3 floats to the top as the piston progresses upward, and by reason of the fact that the chamber 12 is sealed from communication with the chamber 18, the piston itself substantially floats, that is to say, it requires a slight amount of energy to move the piston upward just suiticient to overcome its friction, it being buoyant in the water. It will be observed on the other hand, that its dowmvard movement is analogous bccause in reality it is the downward movement only in the water contained in the tanks 19 and let, because it is balanced by the column of water above the level of the wall. 10. It is therefore obvious that a very slight amount of energy is required to move the piston, and that it is not necessary to lift by this energy the column of water in the conduits 9 and 11 which is above the Wall 10, as thiscolumn of water is balanced by the weight of the piston. As a means for driving this pump, I have provided connected to the stem 1 a secondary piston 20 operable bya pitman 21, the pitman 21 carried by an eccentric pin driven by a motor 24, there being provided an ofl'set chamber 25 to carry the piston 20, and a packing gland 26 to prevent the es capement of water. The stem 4 is interconnected with the piston head 5 by a squirrel cage of bars also suitable manholes 29, EiO and 31 for ease of access specially to the packing glands and valves, there being also provided a packing gland 352 to prevent escapoment of water from the conduit 9.

As many changes could be made in the above construction and many apparently widely dill'ercnt embodiments of my invention, Within the scope of the claims, constructed without departing from the spirit or scope thereof, it intended that all matter contained in the present specification or accompanying drawings shall be interpreted 22 upon a gear wheel 23, the gear Wheel 23 being There are provided in an illustrative and not in a limiting ELDSG.

Claims: 1

1. A pump comprising in combination a main tank open at the top and adapted to 5 be immersed, a partitioning wall in said tank spaced from the open top and provided with suction operable valves, controlled openings communicating with the open top, a second partitioning wall spaced from the first mentioned partitioning wall and :torming a middle compartment: and a lower comiiartment, a conduit protruding beyond the tank and extending into the tank to the first partitioning wall, branches for the conduit of lesser diameter and communicating with 'tl'lOlOTi'Cl' compartment, a passageway between the middle compartment and the lower compartment, a piston in said passageway provided with a stem extending through said conduit, a valve in thepiston head adapted to open and close the passageway.

A pump of the characterdescribed including a tank formed with a plurality of .inter-communicating compartments one above the other, a discharge conduit,a piston stem in said conduit, a passageway between the couniartments and extending into the lower compartment, a piston head iii-said passageway, a *alveiu the piston head adapted to provide communication between said compartments and valve controlled means connecting the compartments with the source of supply.

3. A device o't the character described adapted to be in'uuersed and formed with upper, lower, and middle compartments, valves connecting the compartments with thesource of supply, a conduit formed with lnanches communicating with the lower con'u iartmeut, a piston stem in the conduit, apiston head on the stem, a gravity operable valve in, the piston head adapted at a predetermined point in the travel of the piston to provide connnunication between the compartments.

In testimony whereof I affix my signature.

JOSEPH MILLS. 

